Green building is becoming so prevalent these days that it may not be enough to erect individual eco buildings anymore - the newest trend is entire eco-cities. Expected to be up and running in 2020, Tianjin Eco-City is one of these real-life sustainable communities, spanning 30 square kilometers and showcasing the hottest energy-saving technologies. Designed by Surbana Urban Planning Group, the city will have an advanced light rail transit system and varied eco-landscapes ranging from a sun-powered solarscape to a greenery-clad earthscape for its estimated 350,000 residents to enjoy.